Bicycle-brake.



No. 654,4". Patented luly 24, |900. E. C. F. OTTO & E. C. F. UTTU, In.

BICYCLE BRAKE.

(Application :Bled Feb. 24, 1900.)

(No Model.)

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am: RW 00.. TM, f WE/,f/ v. Num W.

WITNESSES.

EDVARD CHARLES FREDERICK OTTO AND EDl/VARD CHARLES FREDERICK OTTOfJR.,OF HONOR OAK, ENGLAND.

falcYcLE-eRAKE.

SPECIFICATION arming part of Letter; Patent ivo. 654,41 1, dated July24, 1900. Application led February 24, IQO. ASerial No. 6,424. (Nomodel.)

To all whom t mag/concern l the supporting-drum B and the inner pe- Beit known that we, EDWARD CHARLES riphery of thebrake-drum C is thelinked FREDERICK OTTO and EDWARD CHARLES strap or chain band A, the oneend link or of FREDERICK OTTO, J r., subjects of the Queen which isattached tothe supporting-drum B 55 5 of Great Britain, residing atHonor Oak, inv by means of a radially-arranged projection d2 the countyof Surrey, England, have invented on the said link which engages atransverse a new and useful Improvement in Brakes for groove in thedrnm, as shown in Fig. 2, and Velocipedes,(forwhichwe have obtainedLetthe other end link afo'ifthe saidlinked strap ters Patent in GreatBritain, No. 15,503, bearor chain band A is attached to the sprocket- 6oIo ing date the 28th of July, 1899,) of which the wheel Y by means ofatransverse projection following is a full and complete specilication. a3on the said link which engages a hole or Thisinvention relates to animproved brake slot y in the web y of the sprocket-wheel, as forvelocipedes adapted to be pntinto operashown in Fig. 1. VWhenthe pedalsof the tion by the action of back-pedaling; and it cycle are driven ina' forward direction, the 65 I5 consists, essentially,` of twoconcentricallysprocket-wheel Y revolves in the direction arrangeddrums-the one a revolving one of the arrow, Fig. 2, and its motion isimformed on or iixed tothe hub of the drivingparted to the hub "Xi ofthe driving-Wheel wheel and the other a fixed one attached to by reasonof the `end link a of the strap or the frame-and a linked strap or chainband band A bearing against the other end link a 7o zo one end of whichis attached to the revolving ofthe strap orband A, as shown in Fig. 2;but

drum and the other end to the sprocket-wheel, when back 'pressureiseX'erted on the drivingwhich is loosely mounted-on the hub of -thepedals the end link a "ofV the strap or band driving-wheel, the objectbeing to overcome being engaged with the sprocket-wheel moves thedefects com monA to brakes ofthe strap-andin the opposite direction tothe other end link 75 z 5 drum type. r l Y Y i ct of the strap or bandwhich engages the hub In the accompanying drawir1gs,which illusof theWheel through the drum B, which trate this invention, Figurel is abroken view causes the linked strap or chain band A to in sectionalelevation 5 and Fig. 2 is aview in engage the brake drum TC, which itdoes, transverse section on line X X, Fig. 1, showowing to the linkedformation of the strap or 8o 3o ing onevform myinvention may assume.Figs. drum, gradually a link at a time.

3 and 4. are similar views showing an alterna- In the modification shownby Figs. 3 and 4 tive construction and Figs. 5and Gare broken thesupporting-drum B is placed exterior to Views,in side elevation andplan,respectively, the brake-drum C and is fixed to the hub X of thelinked strap or chain band. of thedriving-wheel by means of a hanged 853 5 Similar letters'refer to similar parts through` locking-rin g V. Inthis construction the end out the several views. link a of the strap orband A is attached to Referring to Figs. 1 and 2, on the hub X thesupporting-drum B by means of a radiof the driving-wheel is screwed andfixed by ally-arranged projection d2 on the said link,alocking-ringaanged drumB, hereinafter which engages a transverse groovein the 9o 4o calledthesupporting-drum, whichis adaptdrum, as shown inFig.` 4, and the other end ed to circumferentially support the `linkedylink ct of the strap or band is attached to the strap or chain bandwhen not in use. Mountsprocket-Wheel Y by means of a transverse edloosely on this drum B is the driving 'projection a3 on the said link,which engages sprocket-wheel Y. On the aXleZ of the driva hole or slot yin the web g/,of the sprocket- 95 45 ing-wheel is a drum C, hereinaftercalled the wheel, as shown in Fig. 3. When the bicycle brake-drum, whichis mounted concentricis being driven in a forward direction, the allywith.` the supporting'- drum B and lies motion of the sprocket-wheel Yimparted to within the rim of the sprocket-wheel Y. @This the hub of thedriving-wheel by reasonof the drum C'is soconnected tothe frame of theengagement of the linked strap orbandA roo 5o machine that itz'cannotrevolve. In the anwith the supporting-drum B, and when back nular spacebetween the outer periphery of pressure is exerted on the driving-pedalsthe linked strap or drum A is caused to engage the brake-drum C byreason of the link a moving toward the end link ct.

The linked strap or band A consists of a series of links of metal orother suitable material connectedA together by transverse pins orrivets, as shown by Figs. 5 and 6, or so shaped that they engage oneanother by hooking. When the linked strap or band is i11- tended to actby coming into contact with an internal drum-t'. e., when it would be ina state of compressionthe ends of the links are preferably so shapedthat they abut one against the other, as shown, so as to relieve thepins or rivets connecting them of all strain.

Each link of the strap or band is made of the same width, and itsoperative engaging surface, Whether,y it be the outer or inner'one, ismade of the same curvature as the surface of the drum with which it isintended to engage, so as to obtain the greatest possible amount offrictional surface. If increased frictional resistance is required, itmay be obtained either by lining the brake-drum with leather or othersuitable material or in any other approved manner.

. It will be seen that owing to the link formation of the strap or bandit has no tendency to become set or to lose its shape, and beingsupported it cannot come into accidental contact with the brake-drumwhen the brake is oft Neither does it, as in this type of brake havingspring or elastic straps, absorb a large amount of power to overcome itselasticity when applying it, and, further, it is impossible for thebrake to seize when too suddenly applied, owing to the links comingsuccessively into action.

What we claim, and desire to secure by Letters Patent, is

l. In a brake for velocipedes, the combination, with a supportingdrumrigidly connected with the road-wheel, and a non-revoluble brake-drumarranged concentric with the supporting-drum; of adriving-Wheel, and achain-brake arranged in the space between the said drums and having itsends connected to the said driving -Wheel and supportingdrumrespectively, said chain being composed of pivoted links which arecurved upon the side next to the brake-drum so as to form a continuousbrake-surface of the same curvature as that of the brake-drum,substantially as set forth.

2. In abrake for velocipedes the combination with the hub ot' thedriving-Wheel, of a drum mounted concentrically thereon and adapted tosupport the operating strap or band when the brake is out of action, ofa sprocket-wheel mounted loosely on the said drum, of a second drummounted on the axle of the driving-Wheel concentrically with the firstdrum and so attached to the frame of the machine that it cannot rotate,and of a strap or band formed of a series of links pivoted together sothat their ends abut against one another each link having its operativeface. curved to the same radius as the operative face of the drum withwhich the strap or band engages when the brake is in action, the one endlink ot the said strap or band being connected to the drum fixed to thehub of the driving-wheel and the other end link to the sprocket-wheel,as and for the purpose set forth.

3. In a brake for velocipedes the combination with the hub of thedriving-Wheel, of a drum mounted concentrically thereon and adapted tosu pport the operating strap or band when the brake is out ot' action,of-a sprocket-wheel mounted loosely on the said drum, of a second drummounted on the axle of the driving-Wheel concentrically with the rstdrum and so attached to the frame of the machine that it cannot rotate,and of a strap or band formed'of a series of links pivoted together sothat their ends abut against one another each link being of the samewidth and having its operative face curved to the same radius as theoperative face 'of the drum with which the strap or band engages whenthe brake is in action, the one end link of the said strap or band beingconnected to the drum fixed to the hub of the driving-wheel and theother end link to the sprocket-Wheel, as and for the purpose set forth.

EDWARD CHARLES FREDERICK OTTO. EDWARD CHARLES FREDERICK OTTO, JB.

Witnesses:

A. KNIGHT lCROAD, W. M. HARRIS.

